Spherically averaged X(¹²C) profiles vs. radial bin for each simulation. The green curve is from the FN1 simulation. The blue curve from the FN2 simulation. And the orange curve from the NB1 simulation. The red vertical dashed–dotted line indicates the location of the Urca Shell. The vertical dashed lines indicate the R_conv for the FN2 (blue) and NB1 (orange) simulations